Herrington Arms HC320R Flux Raider Compensator Black. The 320R will work with the stock springs provided your gun has gone through recommended break in period of 500 rounds factory new ammunition is used with the threaded barrel you intend to use with the firearm. Specifications for Herrington Arms HC320R Flux Raider Compensator: Manufacturer: Herrington Arms Fabric/Material: 7075 Aluminum Gun Make: SIG Sauer Gun Model: SIG Sauer P320 Length: 1.6 in Features of Herrington Arms HC320R Flux Raider Compensator This compensator an x carry 3.9" slide and a 4.6in threaded barrel will make the comp flush with the end of the Raider chassis We recommend using our HA 3.9in Guide Rod or DPM Guide Rod Uses Steel replacement 8-32 set screws REQUIRES A THREADED BARREL 1.6" inches in length NOT COMPATABLE WITH BAR-STO KKM OR EFK BARRELS Works with most Sig P320 9mm models With Legion models it may require a DPM spring kit to run 115 grain ammo IF YOU HAVE AN ISSUE ASSEMBLYING WITH THE NEW P320 GUIDE ROD THAT HAS THE GOLD WASHER ON THE END PLEASE SEND US AN EMAIL. WE HAVE A TECHNIQUE TO HELP ASSEMBLY. Blems are cosmetic ONLY. They will function as normal. May have nicks dings pitting machining marks chips discoloration etc. Package Contents: Herrington Arms HC320R Flux Raider Compensator 5/64 Allen key Steel replacement 8-32 What firearm models does the manufacturer say Herrington Arms HC320R Flux Raider Compensator is compatible with? The manufacturer suggests that Herrington Arms HC320R Flux Raider Compensator is compatible with SIG Sauer P320Herrington Arms HC320R-BL: HC320R Flux Raider Compensator Black